51501441 has 4 divisors (see below), whose sum is σ = 68668592. Its totient is φ = 34334292.

The previous prime is 51501433. The next prime is 51501467. The reversal of 51501441 is 14410515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51501441 - 2³ = 51501433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51501491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8583571 + ... + 8583576.

It is an arithmetic number, because the mean of its divisors is an integer number (17167148).

Almost surely, 2^51501441 is an apocalyptic number.

It is an amenable number.

51501441 is a deficient number, since it is larger than the sum of its proper divisors (17167151).

51501441 is a wasteful number, since it uses less digits than its factorization.

51501441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17167150.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 51501441 is about 7176.4504457287. The cubic root of 51501441 is about 372.0544130719.

Adding to 51501441 its reverse (14410515), we get a palindrome (65911956).

The spelling of 51501441 in words is "fifty-one million, five hundred one thousand, four hundred forty-one".